Installation is really easy: just download/wget/curl the files and put them in your home directory, edit your .bash_profile and you’re set. Eric Goodwin also has a great writeup of how to pull the script down and install it if you haven’t compiled git from source. He also has found a fantastic article on bash’s various startup files if this is all new to you.

For OSX users, you can also use MacPorts to install the script. Pratik Naik has a really easy way of installing it if you used the +bash_completion option. If not, it’s probably easier to just deactivate your current version and reinstall it with that option added.

If you know how to accompish this in other shells, comment away or submit a tip!